Problem using NSView's scrollRect:by:
Hi guys.
I'm trying to implement a view that has scroll functionality by itself,
since I cannot use an NSScrollView. I think that NSView's scrollRect:by:
is probably the way to go, but how can I use it? I tried the following
(in a freshly created Xcode project):
AppDelegate.swift:
--- >8 ---
import Cocoa
@NSApplicationMain
class AppDelegate: NSObject, NSApplicationDelegate {
@IBOutlet weak var window: NSWindow!
fileprivate let testView = TestView(frame: CGRect(x: 0, y: 0, width:
400, height: 400))
// This is invoked by a menu item created and linked in the xib file.
@IBAction func triggerScroll(_: Any) {
self.testView.scroll(CGRect(x: 0, y: 0, width: 50, height: 50), by:
CGSize(width: 100, height: 100))
}
func applicationDidFinishLaunching(_: Notification) {
self.window.contentView?.addSubview(self.testView)
}
}
class TestView: NSView {
override func draw(_ dirtyRect: NSRect) {
NSColor.red.set()
NSRectFill(CGRect(x: 0, y: 0, width: 50, height: 50))
}
}
--- 8< ---
What I expected was that the red box at the bottom left corner gets
'copied' to the point (100, 100) when I invoke the triggerScroll action.
However nothing happens. What am I doing wrong?
Thanks in advance and best,
Tae
PS. Other possible solution seems to be to use a CGBitmapContext to draw
stuff into it and, when scrolling, to draw a clipped version of it at
the right location, but it seems to be a quite overkill (if the above
would work...)
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Flush two NSViews with one fixed width using Cocoa Auto Layout
Hi, guys.
I have a problem using Auto Layout in Cocoa. What I want achieve is
simple: I have two custom views, say, Left and Right. I want Left to be
always 100 wide and Right to be flexible, ie resize with the Window:
+--+---+
| | |
| Left | Right|
| 100 wide | flexible |
| | |
+--+---+
I tried H:|[left(100)][right(=100)]| as follows:
- (void)applicationDidFinishLaunching:(NSNotification *)aNotification {
NSView *contentView = self.window.contentView;
DummyView *left = [[DummyView alloc] initWithFrame:CGRectZero];
left.translatesAutoresizingMaskIntoConstraints = NO;
left.backgroundColor = [NSColor yellowColor];
[contentView addSubview:left];
DummyView *right = [[DummyView alloc] initWithFrame:CGRectZero];
right.translatesAutoresizingMaskIntoConstraints = NO;
right.backgroundColor = [NSColor greenColor];
[contentView addSubview:right];
NSDictionary *views = @{
@left : left,
@right : right,
};
// what am I doing wrong?
[contentView addConstraints:[NSLayoutConstraint
constraintsWithVisualFormat:@H:|[left(100)][right(=100)]| options:0
metrics:nil views:views]];
[contentView addConstraints:[NSLayoutConstraint
constraintsWithVisualFormat:@V:|[left]| options:0 metrics:nil
views:views]];
[contentView addConstraints:[NSLayoutConstraint
constraintsWithVisualFormat:@V:|[right]| options:0 metrics:nil
views:views]];
}
The DummyView:
@interface DummyView : NSView
@property (copy) NSColor *backgroundColor;
@end
@implementation DummyView
- (void)drawRect:(NSRect)dirtyRect {
[_backgroundColor set];
NSRectFill(self.frame);
}
@end
The resulting window looks as follows:
http://taewon.de/left-right-screenshot.png or
+--+--+-+
| | | |
| Left | empty | Right |
| 100 wide | space | flexible |
| | | |
+--+--+-+
Why is there an empty space (100 wide) between Left and Right? I also
tried to set the width constraint of Left using
+constraintsWithVisualFormat:options:metrics:views:, but I get the same
result. Am I missing something here?
The project can be also downloaded: https://github.com/qvacua/sandbox
Thanks in advance and best,
Tae
--
@hataewon
http://taewon.de
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Question about adding NSTextView into a zoomed parent view (10.9)
Hi, guys. I have got a problem with adding NSTextView into a zoomed parent view. I've got the following situation: - A custom NSView in an NSScrollView, let's denote this NSView by viewA. - viewA is zoomed by -scaleUnitSquareToSize: - I create an instance of NSTextView with an NSScrollView (and all the other required classes of Cocoa text system) and add the scroll view into viewA. - I scroll the scroll view of viewA such that the newly added text view is visible by -scrollRectToVisible: - The app crashes after showing the zoomed NSTextView Odd points so far: - When viewA is not zoomed, then the app does not crash. - I first add the text view into unzoomed viewA, then remove it by -removeFromSuperview. Then zoom viewA and add the (used) textView again, then the app does not crash, however, the text view does not have the same magnification as viewA. - The code worked on 10.8, but now on 10.9 it crashes as described. If my description is too vague or not precise enough, you can also look at the source code: - https://github.com/qvacua/qmind/blob/issue-20/Qmind/QMMindmapView.m : This is the (zoomable) parent view. - https://github.com/qvacua/qmind/blob/issue-20/Qmind/QMCellEditor.m : In this class I add/remove the text view. To reproduce (on 10.9), you create a new mindmap, zoom in (by pinching for example), select the root node (New Mindmap), then enter the Return-key to edit the node. I don't see what I'm doing wrong... Any help would be greatly appreciated. Best, Tae -- @hataewon http://qvacua.com ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Adding a child view to a zoomed parent view
Hi, guys.
I have the following situation and need help:
* I have a parent view 'pv' which has a unit scale {x, x} where x != 1, say x =
1.1. I used the -scaleUnitSquareToSize: method for this.
* I instantiate a child view 'cv' using -initWithFrame: with a rect, say {100,
100, 100, 100}.
* I add cv to pv using -addSubview:
As far as I understand, the frame I used to instantiate cv is interpreted in
the parent view's coordinate system. Thus, after -addSubview:, cv should have
the frame {100, 100, 100, 100} in pv's coordinate system, right? In my
situation, before cv's -drawRect: is called, -setFrame: of cv is called with
{90.91, 90.91, 90.91, 90.91}, ie the child view is displaced and is drawn
smaller than intended.
It's about the following file, from line 700:
https://github.com/qvacua/qmind/blob/issue/QM-7/Qmind/QMMindmapView.m
To reproduce the problem, just run the app with DEBUG=1 and click the zoom in
button in the toolbar (or pinch) and click anywhere. In the log, you will see
that -setFrame: of the child view gets invoked with weird rect. In the above
file, I use {1000, 500, 100, 100} for the initial frame of the child view and
get {909.09, 454.55, 90.91, 90.91} after adding it to the parent view with unit
scale {1.1, 1.1}.
When I use a dummy project where both the parent and child view are dummies, it
works as intended, ie no -setFrame: call to the child view. Thus, the child
view is not displaced and has the right size.
Am I missing something or doing something wrong?
Thanks in advance and best,
Tae
--
http://qvacua.com
https://github.com/qvacua/
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-mouseDragged: invoked when it should not (and without mouseDown)
Hi, guys. I need some help in event handling. I have a custom view embedded in a scroll view which is embedded in a split view. The window has got a toolbar. When I move the window down by dragging the toolbar, very often the -mouseDragged: of my custom view gets invoked. Curiously enough, it does not seem to happen when I drag the window up. My questions: - Why? - When I NSLog() things, I see that -mouseDown: of the custom view is not invoked. What's going on? It's the following file https://github.com/qvacua/qmind/blob/master/Qmind/QMMindmapView.m from line 706. I created a dummy project which has got a dummy -mouseDragged: implementation inside a window with a toolbar. In the dummy project it does not happen at all. I'm clueless. Am I missing something quite simple here? Anybody had similar problems? Thanks in advance. Best, Tae -- http://qvacua.com ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
